Channel quality information feedback techniques

ABSTRACT

Various embodiments are generally directed to improved channel quality information feedback techniques. In one embodiment, for example, an evolved node B (eNB) may comprise a processor circuit, a communication component for execution by the processor circuit to receive a channel quality index for a physical downlink shared channel (PDSCH), the channel quality index associated with a defined reference resource, and a selection component for execution by the processor circuit to select a modulation and coding scheme (MCS) for transmission over the PDSCH of user equipment (UE) data in one or more resource blocks, the selection component to compensate for a difference between a cell-specific reference signal (CRS) overhead of the defined reference resource and a CRS overhead of the one or more resource blocks when selecting the MCS. Other embodiments are described and claimed.

RELATED CASE

This application claims priority to U.S. Provisional Patent ApplicationNo. 61/748,706, filed Jan. 3, 2013, the entirety of which is herebyincorporated by reference.

TECHNICAL FIELD

Embodiments herein generally relate to wireless mobile broadbandcommunications.

BACKGROUND

In a wireless radio access network such as an evolved universal mobiletelecommunications system (UMTS) terrestrial radio access network(E-UTRAN), channel quality feedback techniques may be implemented inorder to enable evolved node Bs (eNBs) to use suitable modulation andcoding schemes (MCSs) when sending messages to user equipment (UEs).According to some such techniques, UEs may periodically and/oraperiodically transmit channel quality indicator (CQI) indices to theirserving eNBs. Each CQI index may indicate an MCS that its UE expects tobe suitable for use in prospective transmission of a message from an eNBto that UE during a particular subframe.

In some cases, each transmitted message may be transmitted as one ormore resource elements (REs) within one or more resource blocks, and theMCS that is actually most suitable for transmitting a particular messagemay depend on the structures the resource blocks that contain it. Sincethe UEs cannot know the actual structures of such resource blocks untilafter they are received, the UEs may define channel state information(CSI) reference resources based on which to select CQI indices. Each CSIreference resource may comprise a generic expected structure forresource blocks via which its associated UE may expect to receive aprospective message during a particular subframe. Once it defines a CSIreference resource for a given subframe, a UE may select a CQI index forthat subframe based on the CSI reference resource.

In some wireless radio access networks, the use of particular featuresmay affect the structures of the resource blocks that carry messages toUEs. For example, when an enhanced physical downlink control channel(EPDCCH) is implemented within a physical downlink shared channel(PDSCH) of a E-UTRAN, some REs within PDSCH resource blocks may beallocated to the EPDCCH. In another example, for any particular PDSCHresource block, the number of REs that contain cell-specific referencesignals (CRSs) may depend on a number of CRS antenna ports that areconfigured for the eNB transmitting that PDSCH resource block. In orderto enable proper MCS selection, it may be desirable to account for sucheffects in conjunction with CQI index reporting and/or interpretation,either by incorporating them into the definition of the CSI referenceresource on the UE side or by compensating for them on the eNB side.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates one embodiment of an operating environment.

FIG. 2 illustrates one embodiment of a first apparatus and oneembodiment of a first system.

FIG. 3 illustrates one embodiment of a first logic flow.

FIG. 4 illustrates one embodiment of a second apparatus and oneembodiment of a second system.

FIG. 5 illustrates one embodiment of a second logic flow.

FIG. 6 illustrates one embodiment of a storage medium

FIG. 7 illustrates one embodiment of a computing architecture.

FIG. 8 illustrates one embodiment of a communications system.

DETAILED DESCRIPTION

Various embodiments are generally directed to improved channel qualityinformation feedback techniques. In one embodiment, for example, anevolved node B (eNB) may comprise a processor circuit, a communicationcomponent for execution by the processor circuit to receive a channelquality index for a physical downlink shared channel (PDSCH), thechannel quality index associated with a defined reference resource, anda selection component for execution by the processor circuit to select amodulation and coding scheme (MCS) for transmission over the PDSCH ofuser equipment (UE) data in one or more resource blocks, the selectioncomponent to compensate for a difference between a cell-specificreference signal (CRS) overhead of the defined reference resource and aCRS overhead of the one or more resource blocks when selecting the MCS.Other embodiments are described and claimed.

Various embodiments may comprise one or more elements. An element maycomprise any structure arranged to perform certain operations. Eachelement may be implemented as hardware, software, or any combinationthereof, as desired for a given set of design parameters or performanceconstraints. Although an embodiment may be described with a limitednumber of elements in a certain topology by way of example, theembodiment may include more or less elements in alternate topologies asdesired for a given implementation. It is worthy to note that anyreference to “one embodiment” or “an embodiment” means that a particularfeature, structure, or characteristic described in connection with theembodiment is included in at least one embodiment. The appearances ofthe phrases “in one embodiment,” “in some embodiments,” and “in variousembodiments” in various places in the specification are not necessarilyall referring to the same embodiment.

The techniques disclosed herein may involve transmission of data overone or more wireless connections using one or more wireless mobilebroadband technologies. For example, various embodiments may involvetransmissions over one or more wireless connections according to one ormore 3rd Generation Partnership Project (3GPP), 3GPP Long Term Evolution(LTE), and/or 3GPP LTE-Advanced (LTE-A) technologies and/or standards,including their revisions, progeny and variants. More particularly,various embodiments may involve transmissions over one or more wirelessconnections according to technologies and/or standards comprised in 3GPPRelease 11, initially released Q3 2012, including their revisions,progeny and variants. Hereinafter, such embodiments shall be referred toas “3GPP Rel-11” embodiments.

Some embodiments may additionally or alternatively involve transmissionsaccording to one or more Global System for Mobile Communications(GSM)/Enhanced Data Rates for GSM Evolution (EDGE), Universal MobileTelecommunications System (UMTS)/High Speed Packet Access (HSPA), and/orGSM with General Packet Radio Service (GPRS) system (GSM/GPRS)technologies and/or standards, including their revisions, progeny andvariants. Examples of wireless mobile broadband technologies may alsoinclude without limitation any of the Institute of Electrical andElectronics Engineers (IEEE) 802.16m and/or 802.16p, InternationalMobile Telecommunications Advanced (IMT-ADV), Worldwide Interoperabilityfor Microwave Access (WiMAX) and/or WiMAX II, Code Division MultipleAccess (CDMA) 2000 (e.g., CDMA2000 1×RTT, CDMA2000 EV-DO, CDMA EV-DV,and so forth), High Performance Radio Metropolitan Area Network(HIPERMAN), Wireless Broadband (WiBro), High Speed Downlink PacketAccess (HSDPA), High Speed Orthogonal Frequency-Division Multiplexing(OFDM) Packet Access (HSOPA), High-Speed Uplink Packet Access (HSUPA)technologies and/or standards, including their revisions, progeny andvariants. The embodiments are not limited in this context.

In addition to transmission over one or more wireless connections, thetechniques disclosed herein may involve transmission of content over oneor more wired connections through one or more wired communicationsmedia. Examples of wired communications media may include a wire, cable,metal leads, printed circuit board (PCB), backplane, switch fabric,semiconductor material, twisted-pair wire, co-axial cable, fiber optics,and so forth. The embodiments are not limited in this context.

Reference is now made to the drawings, wherein like reference numeralsare used to refer to like elements throughout. In the followingdescription, for purposes of explanation, numerous specific details areset forth in order to provide a thorough understanding thereof. It maybe evident, however, that the novel embodiments may be practiced withoutthese specific details. In other instances, well known structures anddevices are shown in block diagram form in order to facilitate adescription thereof. The intention is to cover all modifications,equivalents, and alternatives consistent with the claimed subjectmatter.

FIG. 1 illustrates an example of an operating environment 100 that maybe representative of various embodiments. As shown in FIG. 1, a mobiledevice 102 communicates with a fixed device 104 via an uplink channel106 and a downlink channel 108. In some 3GPP Rel-11 embodiments, mobiledevice 102 may comprise user equipment (a UE), fixed device 104 maycomprise an evolved Node B (eNB), uplink channel 106 may comprise aphysical uplink shared channel (PUSCH) or a physical uplink controlchannel (PUCCH), and downlink channel 108 may comprise a physicaldownlink shared channel (PDSCH). The embodiments are not limited in thiscontext.

In order to determine parameters, such as a modulation and codingscheme, for use in transmission of data to mobile device 102 viadownlink channel 108, fixed device 104 may transmit a reference signal110 to mobile device 102 via downlink channel 108. Mobile device 102 mayperform channel estimation for downlink channel 108 based on referencesignal 110, select a channel quality index 112 based on the channelestimation, and send the channel quality index 112 to fixed device 104via uplink channel 106. Fixed device 104 may then apply parametersdefined by channel quality index 112 to transmit message 114 to mobiledevice 102 via downlink channel 108. In various 3GPP Rel-11 embodiments,reference signal 110 may comprise one or more resource elements (REs)within one or more resource blocks, and channel quality index 112 maycomprise a channel quality indicator (CQI) index. The embodiments arenot limited in this context.

In some embodiments, mobile device 102 may define a reference resourcecomprising a generic expected structure of resource blocks via which itmay receive message 114. Based on the quality with which it receivesreference signal 110 via downlink channel 108, mobile device 102 maythen select a channel quality index 112 that defines transmissionparameters that mobile device 102 estimates will yield a particularlevel of received quality for data hypothetically transmitted from fixeddevice 104 to mobile device 102 within the reference resource. Forexample, mobile device 102 may select a channel quality index 112 thatindicates a most efficient modulation and coding scheme via which itestimates it could receive data within the reference resource overdownlink channel 108 with a transport block error probability of nogreater than 10%. In various 3GPP Rel-11 embodiments, the referenceresource may comprise a channel state information (CSI) referenceresource. The embodiments are not limited in this context.

In some embodiments, the quality with which mobile device 102 mightexpect to receive data within the reference resource may depend on thestructure of the reference resource, and thus the selection of channelquality index 112 may depend on the structure of the reference resource.For example, in various embodiments, the received quality level thatmobile device 102 estimates may depend on how many REs in the referenceresource are assumed to comprise data intended for mobile device 102 andhow many REs are assumed to comprise data associated with various typesof overhead. In some embodiments, mobile device 102 may therefore beoperative to select channel quality index 112 based in part on a numberof resource elements (REs) in the reference resource that are assumed tocontain data intended for mobile device 102. In various embodiments, theselection of channel quality index 112 may additionally or alternativelydepend on one or more assumptions regarding the transmission origin ofthe reference resource. For example, in some embodiments, mobile device102 may be operative to select channel quality index 112 based in parton an assumption that the reference resource is transmitted from a samelocation as that from which fixed device 104 transmitted referencesignal 110, rather than from another location and/or fixed device. Theembodiments are not limited in this context.

In various embodiments, if the structures of the resource blockscontaining message 114 and/or their transmission origins differmaterially from the assumptions associated with the reference resource,the selected channel quality index 112 may not define transmissionparameters that are suitable for transmission of message 114 to mobiledevice 102. For example, if message 114 comprises a different number ofREs containing data intended for mobile device 102 than the numberassumed with respect to the reference resource, the selected channelquality index 112 may not be suitable for transmission of message 114.In another example, if it has been assumed that the reference resourceis transmitted from a same location as was reference signal 110 but thenmessage 114 is contained in resource blocks transmitted from a differentlocation than was reference signal 110, the selected channel qualityindex 112 may not be suitable for transmission of message 114. Theembodiments are not limited to this example.

In some embodiments, the use of particular features may affect thestructures, transmission origins, and/or other characteristics ofdownlink channel resource blocks. For example, in various embodiments, adownlink control channel implemented within downlink channel 108 mayoccupy REs within resource blocks of downlink channel 108. In anotherexample, in some embodiments, some downlink channel resource block REsmay be allocated for one or more cell-specific reference signals (CRSs)corresponding to one or more CRS antenna ports of fixed device 104. Inorder to enable the proper selection of transmission parameters such asan MCS for message 114, it may be desirable to account for such effectsin conjunction with the selection of channel quality index 112 at mobiledevice 102 and/or the interpretation of channel quality index 112 atfixed device 104.

Disclosed herein are improved channel quality information feedbacktechniques that may enable the selection of suitable transmissionparameters by accounting for one or more features affecting thestructures, transmission origins, and/or other characteristics ofdownlink channel resource blocks. In various embodiments, suchaccounting may be performed on the mobile device side, where thereference resource may be defined to account for such features. In someembodiments, such accounting may alternatively or additionally beperformed on the fixed device side, where compensation for such featuresmay be performed during transmission parameter selection. Theembodiments are not limited in this context.

FIG. 2 illustrates a block diagram of an apparatus 200, which maycomprise an example of mobile device 102 of FIG. 1 in variousembodiments. More particularly, apparatus 200 comprises an example of amobile device that may be configured to define a reference resource suchas to account for features affecting the structures of downlink channelresource blocks. In some 3GPP Rel-11 embodiments, apparatus 200 maycomprise a UE. As shown in FIG. 2, apparatus 200 comprises multipleelements including a processor circuit 202 and a memory unit 204.However, the embodiments are not limited to the type, number, orarrangement of elements shown in FIG. 2.

In some embodiments, apparatus 200 may comprise processor circuit 202.Processor circuit 202 may be implemented using any processor or logicdevice, such as a complex instruction set computer (CISC)microprocessor, a reduced instruction set computing (RISC)microprocessor, a very long instruction word (VLIW) microprocessor, anx86 instruction set compatible processor, a processor implementing acombination of instruction sets, a multi-core processor such as adual-core processor or dual-core mobile processor, or any othermicroprocessor or central processing unit (CPU). Processor circuit 202may also be implemented as a dedicated processor, such as a controller,a microcontroller, an embedded processor, a chip multiprocessor (CMP), aco-processor, a digital signal processor (DSP), a network processor, amedia processor, an input/output (I/O) processor, a media access control(MAC) processor, a radio baseband processor, an application specificintegrated circuit (ASIC), a field programmable gate array (FPGA), aprogrammable logic device (PLD), and so forth. In one embodiment, forexample, processor circuit 202 may be implemented as a general purposeprocessor, such as a processor made by Intel® Corporation, Santa Clara,Calif. The embodiments are not limited in this context.

In various embodiments, apparatus 200 may comprise or be arranged tocommunicatively couple with a memory unit 204. Memory unit 204 may beimplemented using any machine-readable or computer-readable mediacapable of storing data, including both volatile and non-volatilememory. For example, memory unit 204 may include read-only memory (ROM),random-access memory (RAM), dynamic RAM (DRAM), Double-Data-Rate DRAM(DDRAM), synchronous DRAM (SDRAM), static RAM (SRAM), programmable ROM(PROM), erasable programmable ROM (EPROM), electrically erasableprogrammable ROM (EEPROM), flash memory, polymer memory such asferroelectric polymer memory, ovonic memory, phase change orferroelectric memory, silicon-oxide-nitride-oxide-silicon (SONOS)memory, magnetic or optical cards, or any other type of media suitablefor storing information. It is worthy of note that some portion or allof memory unit 204 may be included on the same integrated circuit asprocessor circuit 202, or alternatively some portion or all of memoryunit 204 may be disposed on an integrated circuit or other medium, forexample a hard disk drive, that is external to the integrated circuit ofprocessor circuit 202. Although memory unit 204 is comprised withinapparatus 200 in FIG. 2, memory unit 204 may be external to apparatus200 in some embodiments. The embodiments are not limited in thiscontext.

FIG. 2 also illustrates a block diagram of a system 240. System 240 maycomprise any of the aforementioned elements of apparatus 200. System 240may further comprise one or more additional components. For example, invarious embodiments, system 240 may comprise a radio frequency (RF)transceiver 244. RF transceiver 244 may include one or more radioscapable of transmitting and receiving signals using various suitablewireless communications techniques. Such techniques may involvecommunications across one or more wireless networks. Exemplary wirelessnetworks include (but are not limited to) wireless local area networks(WLANs), wireless personal area networks (WPANs), wireless metropolitanarea network (WMANs), cellular networks, and satellite networks. Incommunicating across such networks, RF transceiver 244 may operate inaccordance with one or more applicable standards in any version. Theembodiments are not limited in this context.

In some embodiments, system 240 may comprise one or more RF antennas257. Examples of any particular RF antenna 257 may include an internalantenna, an omni-directional antenna, a monopole antenna, a dipoleantenna, an end-fed antenna, a circularly polarized antenna, amicro-strip antenna, a diversity antenna, a dual antenna, a tri-bandantenna, a quad-band antenna, and so forth. The embodiments are notlimited to these examples.

In various embodiments, system 240 may include a display 245. Display245 may comprise any display device capable of displaying informationreceived from processor circuit 202. Examples for display 245 mayinclude a television, a monitor, a projector, and a computer screen. Inone embodiment, for example, display 245 may be implemented by a liquidcrystal display (LCD), light emitting diode (LED) or other type ofsuitable visual interface. Display 245 may comprise, for example, atouch-sensitive display screen (“touchscreen”). In variousimplementations, display 245 may comprise one or more thin-filmtransistors (TFT) LCD including embedded transistors. The embodimentsare not limited in this context.

In general operation, apparatus 200 and/or system 240 may be operativeto select a channel quality index 206 for transmission to a fixed device250. In various embodiments, channel quality index 206 may compriseinformation indicating and/or corresponding to one or more transmissionparameters for use by fixed device 250 in transmitting data to apparatus200 and/or system 240. For example, in some embodiments, channel qualityindex 206 may comprise an index number corresponding to a modulation andcoding scheme to be used by fixed device 250. In various 3GPP Rel-11embodiments, the channel quality index 206 may comprise a channelquality indicator (CQI) index. The embodiments are not limited in thiscontext.

In some embodiments, apparatus 200 and/or system 240 may comprise acommunication component 208. Communication component 208 may compriselogic, circuitry, and/or instructions operative to send messages tofixed device 250 and/or to receive messages from fixed device 250. Invarious embodiments, communication component 208 may be operative tosend and/or receive messages via RF transceiver 244 and one or more RFantennas 257. In some embodiments, communication component 208 may beoperative to generate and/or process messages according to one or morewireless communications standards. For example, in various 3GPP Rel-11embodiments, communication component 208 may be operative to generateand/or process messages according to one or more 3GPP specifications.The embodiments are not limited in this context.

In various embodiments, communication component 208 may be operative toreceive a reference signal 210 from fixed device 250. In someembodiments, reference signal 210 may comprise a signal for use byapparatus 200 and/or system 240 to estimate a quality of a downlinkchannel 212 from fixed device 250 to apparatus 200 and/or system 240. Invarious embodiments, reference signal 210 may comprise information inone or more resource elements and/or resource blocks in one or moresubframes and/or frames transmitted by fixed device 250 over thedownlink channel 212. In some 3GPP Rel-11 embodiments, reference signal210 may comprise a channel state information reference signal (CSI-RS)and a channel state information interference measurement (CSI-IM)resource. In various embodiments, the downlink channel 212 may comprisea shared channel. For example, in some 3GPP Rel-11 embodiments, thedownlink channel 212 may comprise a PDSCH. The embodiments are notlimited in this context.

In various embodiments, apparatus 200 and/or system 240 may comprise adetermination component 214. Determination component 214 may compriselogic, circuitry, and/or instructions operative to determine a receivedquality parameter 216 for reference signal 210. In some embodiments,received quality parameter 216 may comprise an estimated channel qualityfor downlink channel 212. In various embodiments, determinationcomponent 214 may be operative to determine received quality parameter216 based on the powers with which it receives various resource elementsof reference signal 210. In some 3GPP Rel-11 embodiments, receivedquality parameter 216 may comprise channel measurements for a CSI-RS andinterference measurements for a CSI-IM resource. The embodiments are notlimited in this context.

In various embodiments, determination component 214 may be operative todefine a reference resource 218 for downlink channel 212. Referenceresource 218 may comprise a generic expected structure of resourceblocks via which apparatus 200 and/or system 240 may prospectivelyreceive a message over downlink channel 212. In some 3GPP Rel-11embodiments, reference resource 218 may comprise a CSI referenceresource. In various embodiments, determination component 214 may beoperative to define reference resource 218 to contain data REs 220 andoverhead REs 222. Data REs 220 may comprise REs of reference resource218 that are defined as being allocated for use in conveying the messageprospectively transmitted via reference resource 218, while overhead REs222 may comprise REs allocated for use in implementing various wirelessnetwork features. In some embodiments, the number of data REs 220 inreference resource 218 may depend on the number of overhead REs 222 inreference resource 218. In various embodiments, determination component214 may be operative to define reference resource 218 by allocating alloverhead REs 222 required by any configured wireless network featuresand then designating the remaining available REs in reference resource218 as data REs 220. The embodiments are not limited in this context.

In some embodiments, determination component 214 may be operative todefine reference resource 218 to include one or more overhead REs 222allocated to a downlink control channel implemented within downlinkchannel 212. In various 3GPP Rel-11 embodiments, the downlink controlchannel may comprise an enhanced physical downlink control channel(EPDCCH). In some 3GPP Rel-11 embodiments, apparatus 200 and/or system240 may comprise a UE configured with one or both of a EPDCCH physicalresource block (PRB) set 0 and an EPDCCH-PRB set 1. In various 3GPPRel-11 embodiments, determination component 214 may be operative todefine reference resource 218 to include one or more overhead REs 222allocated to EPDCCH-PRB set 0. In some 3GPP Rel-11 embodiments,determination component 214 may be operative to define referenceresource 218 to include one or more overhead REs 222 allocated toEPDCCH-PRB set 1. In various 3GPP Rel-11 embodiments, determinationcomponent 214 may be operative to define reference resource 218 toinclude one or more overhead REs 222 allocated to EPDCCH-PRB set 0 andto also include one or more overhead REs 222 allocated to EPDCCH-PRBset 1. The embodiments are not limited in this context.

It is worthy of note that in some embodiments, rather than definingreference resource 218 such as to account for the implementation of adownlink control channel within downlink channel 212, determinationcomponent 214 may be operative to define reference resource 218 withoutregard for whether a downlink control channel is implemented. In varioussuch embodiments, determination component 214 may be operative to definereference resource 218 such that no overhead REs 222 in referenceresource 218 are allocated to a downlink control channel. For example,in some 3GPP Rel-11 embodiments, determination component 214 may beoperative to define reference resource 218 such that overhead REs 222 donot contain REs comprising EPDCCH overhead. In such embodiments,compensation for the use of the EPDCCH may be performed on the eNB side.The embodiments are not limited in this context.

In various embodiments, determination component 214 may be operative todefine reference resource 218 to include one or more overhead REs 222comprising cell-specific reference signal (CRS) overhead. In some 3GPPRel-11 embodiments, determination component 214 may be operative todefine reference resource 218 in conjunction with a CSI process forapparatus 200 and/or system 240, and the CSI process may be configuredwith PMI/RI reporting. In various 3GPP Rel-11 embodiments, determinationcomponent 214 may be operative to define reference resource 218 toinclude a number of CRS overhead REs 222 corresponding to a number ofCRS antenna ports configured for a serving cell of apparatus 200 and/orsystem 240. In some 3GPP Rel-11 embodiments, determination component 214may be operative to define reference resource 218 to include a number ofCRS overhead REs 222 corresponding to a number of CRS antenna portsassociated with a PDSCH RE mapping and quasi-location indicator (PQI)state with a lowest index value. In various 3GPP Rel-11 embodiments, forany given CSI process, determination component 214 may be operative todefine reference resource 218 to include a number of CRS overhead REs222 corresponding to a number of CRS antenna ports associated with anon-zero power (NZP) CSI-RS for that CSI process. The embodiments arenot limited in this context.

In some embodiments, apparatus 200 and/or system 240 may comprise aselection component 224. Selection component 224 may comprise logic,circuitry, and/or instructions operative to select a channel qualityindex 206 for transmission to fixed device 250. In various embodiments,selection component 224 may be operative to select channel quality index206 based on received quality parameter 216 and on the referenceresource 218 defined by determination component 214. In someembodiments, selection component 224 may be operative to select achannel quality index 206 that indicates a most efficient MCS via whichit estimates that a message could be received via reference resource 218with a particular level of accuracy and/or quality. For example, invarious 3GPP Rel-11 embodiments, selection component 224 may beoperative to select a channel quality index 206 comprising a CQI indexindicating a most efficient MCS via which it estimates that a messagecould be received via reference resource 218 with a transport blockerror probability of no greater than 10%. The embodiments are notlimited to this example.

In some embodiments, communication component 208 may be operative tosend channel quality index 206 to fixed device 250. In variousembodiments, communication component 208 may be operative to transmitchannel quality index 206 to fixed device 250 over an uplink channel220. In some 3GPP Rel-11 embodiments, the uplink channel 220 maycomprise a PUSCH or PUCCH. The embodiments are not limited in thiscontext.

Operations for the above embodiments may be further described withreference to the following figures and accompanying examples. Some ofthe figures may include a logic flow. Although such figures presentedherein may include a particular logic flow, it can be appreciated thatthe logic flow merely provides an example of how the generalfunctionality as described herein can be implemented. Further, the givenlogic flow does not necessarily have to be executed in the orderpresented unless otherwise indicated. In addition, the given logic flowmay be implemented by a hardware element, a software element executed bya processor, or any combination thereof. The embodiments are not limitedin this context.

FIG. 3 illustrates one embodiment of a logic flow 300, which may berepresentative of the operations executed by one or more embodimentsdescribed herein. More particularly, logic flow 300 may comprise anexample of operations that apparatus 200 and/or system 240 of FIG. 2 mayperform in conjunction with selection of channel quality index 206. Asshown in FIG. 3, a reference signal may be received at 302. For example,communication component 208 may be operative to receive reference signal210 over downlink channel 212. At 304, a received quality parameter maybe determined for the reference signal. For example, determinationcomponent 214 of FIG. 2 may be operative to determine received qualityparameter 216 based on a power with which it receives reference signal210. At 306, a reference resource may defined for a downlink channel.For example, determination component 214 of FIG. 2 may be operative todefine reference resource 218 for downlink channel 212. In variousembodiments, the reference resource may be defined to include one ormore REs allocated to a downlink control channel implemented within thedownlink channel. In some embodiments, the reference resource may bedefined to include a set of CRS overhead REs.

At 308, a channel quality index may be selected based on the receivedquality parameter and the reference resource. For example, selectioncomponent 224 of FIG. 2 may be operative to select channel quality index206 based on received quality parameter 216 and reference resource 218.At 310, the channel quality index may be transmitted over an uplinkchannel. For example, communication component 208 of FIG. 2 may beoperative on RF transceiver 244 to transmit channel quality index 206over uplink channel 220. The embodiments are not limited to theseexamples.

FIG. 4 illustrates an embodiment of an apparatus 400, which may comprisean example of fixed device 104 of FIG. 1 and/or fixed device 250 of FIG.2. More particularly, apparatus 400 may comprise an example of a fixeddevice that may be configured to select transmission parameters for adownlink channel such as to account for features affecting thestructures of resource blocks of the downlink channel. In various 3GPPRel-11 embodiments, apparatus 400 may comprise an eNB. As shown in FIG.4, apparatus 400 comprises multiple elements including a processorcircuit 402 and a memory unit 404. However, the embodiments are notlimited to the type, number, or arrangement of elements shown in FIG. 4.

In some embodiments, apparatus 400 may comprise processor circuit 402.Processor circuit 402 may be implemented using any processor or logicdevice, and may be the same as or similar to processor circuit 202 ofFIG. 2. In various embodiments, apparatus 400 may comprise or bearranged to communicatively couple with a memory unit 404. Memory unit404 may be implemented using any machine-readable or computer-readablemedia capable of storing data, including both volatile and non-volatilememory, and may be the same as or similar to memory unit 204 of FIG. 2.

FIG. 4 also illustrates a block diagram of a system 440. System 440 maycomprise any of the aforementioned elements of apparatus 400. System 440may further comprise one or more additional components. For example, invarious embodiments, system 440 may comprise a radio frequency (RF)transceiver 444. RF transceiver 444 may include one or more radioscapable of transmitting and receiving signals using various suitablewireless communications techniques, and may be the same as or similar toRF transceiver 244 of FIG. 2. In some embodiments, system 440 maycomprise one or more RF antennas 457. Examples of any particular RFantenna 457 may include any of the examples previously mentioned withrespect to RF antennas 257 of FIG. 2. The embodiments are not limited inthis context.

In general operation, apparatus 400 and/or system 440 may be operativeto select one or more transmission parameters for use in transmitting amessage 435 to a mobile device 450 over a downlink channel 412. In someembodiments, the one or more transmission parameters may comprise amodulation and coding scheme. In various 3GPP Rel-11 embodiments,apparatus 400 and/or system 440 may comprise an eNB, mobile device 450may comprise a UE, and downlink channel 412 may comprise a PDSCH. Insome embodiments, apparatus 400 and/or system 440 may be operative toreceive a channel quality index 406 from mobile device 450 and to selectthe one or more transmission parameters based at least in part on thechannel quality index 406. In various 3GPP Rel-11 embodiments, thechannel quality index 406 may comprise a CQI index. The embodiments arenot limited in this context.

In some embodiments, apparatus 400 and/or system 440 may comprise acommunication component 408. Communication component 408 may compriselogic, circuitry, and/or instructions operative to send messages tomobile device 450 and/or to receive messages from mobile device 450. Invarious embodiments, communication component 408 may be operative tosend and/or receive messages via RF transceiver 444 and one or more RFantennas 457. In some embodiments, communication component 408 may beoperative to generate and/or process messages according to one or morewireless communications standards. For example, in various 3GPP Rel-11embodiments, communication component 408 may be operative to generateand/or process messages according to one or more 3GPP specifications.The embodiments are not limited in this context.

In various embodiments, communication component 408 may be operative toreceive channel quality index 406 from mobile device 450 over an uplinkchannel 420. In some 3GPP Rel-11 embodiments, uplink channel 420 maycomprise a PUSCH or a PUCCH. In various embodiments, mobile device 450may define a reference resource and select channel quality index 406based on the defined reference resource. In some 3GPP Rel-11embodiments, the reference resource may comprise a CSI referenceresource. In various such embodiments, the structure of resource blocksof downlink channel 412 to be used to transmit message 435 may differfrom the defined reference resource due to one or more types ofoverhead. The embodiments are not limited in this context.

In some embodiments, apparatus 400 and/or system 440 may comprise adetermination component 414. Determination component 414 may compriselogic, circuitry, and/or instructions operative to determine one or moretypes of overhead for the resource blocks of downlink channel 412. Invarious embodiments, the one or more types of overhead may occupy one ormore REs in the one or more resource blocks.

In some embodiments, determination component 414 may be operative todetermine an overhead corresponding to the implementation of a downlinkcontrol channel within downlink channel 412. In various embodiments,determination component 414 may be operative to determine a number ofREs in each resource block of downlink channel 412 that are allocated tothe downlink control channel. In some 3GPP Rel-11 embodiments, thedownlink control channel may comprise an enhanced physical downlinkcontrol channel (EPDCCH). In various 3GPP Rel-11 embodiments, channelquality index 406 may comprise a CQI index corresponding to a CSIreference resource defined to comprise no EPDCCH overhead. In some 3GPPRel-11 embodiments, determination component 414 may be operative todetermine an EPDCCH overhead corresponding to one or more EPDCCHphysical resource block (PRB) sets configured for downlink channel 412.In various 3GPP Rel-11 embodiments, determination component 414 may beoperative to determine an EPDCCH overhead corresponding to EPDCCH PRBset 0, to EPDCCH PRB set 1, or both. The embodiments are not limited inthis context.

In some embodiments, determination component 414 may be operative todetermine a cell-specific reference signal (CRS) overhead for one ormore resource blocks of downlink channel 412. In various embodiments,the CRS overhead for the one or more resource blocks of downlink channel412 may correspond to a number of CRS antenna ports used by apparatus400 and/or system 440. In some embodiments, the CRS overhead for the oneor more resource blocks may differ from a CRS overhead for the referenceresource based upon which channel quality index 406 was selected. Invarious such embodiments, a number of CRS REs in the one or moreresource blocks may differ from a number of CRS REs in the referenceresource. In some embodiments, the CRS overhead for the referenceresource may comprise a number of REs corresponding to a number of CRSantenna ports configured for a serving cell of mobile device 450. Invarious embodiments, the CRS overhead for the reference resource maycomprise a number of REs corresponding to a number of CRS antenna portsassociated with a PDSCH RE mapping and quasi-location indicator (PQI)state with a lowest index value. In some embodiments, the CRS overheadfor the reference resource may comprise a number of REs corresponding toa number of CRS antenna ports associated with a non-zero power (NZP)CSI-RS for a CSI process of mobile device 450. The embodiments are notlimited in this context.

In various embodiments, apparatus 400 and/or system 440 may comprise aselection component 424. Selection component 424 may comprise logic,circuitry, and/or instructions operative to select a modulation andcoding scheme (MCS) for transmission of message 435 to mobile device 450over downlink channel 412. In some 3GPP Rel-11 embodiments, message 435may comprise UE data in one or more PDSCH resource blocks. Theembodiments are not limited in this context.

In various embodiments, selection component 424 may be operative toselect the MCS based on channel quality index 406 on the downlinkcontrol channel overhead and/or the CRS overhead determined bydetermination component 414. For example, in some 3GPP Rel-11embodiments, selection component 424 may be operative to select the MCSbased on a determined EPDCCH overhead and a determined CRS overhead forPDSCH resource blocks to be used to transmit message 435. In various3GPP Rel-11 embodiments, selection component 424 may be operative tocompensate for a difference between a CRS overhead of the referenceresource and a CRS overhead for the PDSCH resource blocks when selectingthe MCS. In some such 3GPP Rel-11 embodiments, selection component 424may be operative to compensate for a difference between a number of CRSREs in the reference resource and a number of CRS REs in each of the oneor more PDSCH resource blocks. In various embodiments, channel qualityindex 406 may indicate a first MCS, and selection component 424 may beoperative to either select the first MCS or to identify and select asecond MCS based on the difference between the CRS overhead of thereference resource and the CRS overhead of the one or more PDSCHresource blocks, and/or based on the determined EPDCCH overhead. Theembodiments are not limited in this context.

In some embodiments, communication component 408 may be operative totransmit message 435 to mobile device 450 via downlink channel 412. Invarious embodiments, communication component 408 may be operative totransmit message 435 using the MCS selected by selection component 424for one or more resource blocks of downlink channel 412. In someembodiments, communication component 408 may be operative to transmitmessage 435 as data within one or more REs of the one or more resourceblocks. The embodiments are not limited in this context.

FIG. 5 illustrates one embodiment of a logic flow 500, which may berepresentative of the operations executed by one or more embodimentsdescribed herein. More particularly, logic flow 500 may comprise anexample of operations that apparatus 400 and/or system 440 of FIG. 4 mayperform in conjunction with selection of a modulation and coding schemefor transmission of message 435. As shown in FIG. 5, a channel qualityindex may be received at 502. For example, communication component 408of FIG. 4 may be operative to receive channel quality index 406 frommobile device 450 over uplink channel 420. At 504, an overhead may bedetermined for a downlink channel. For example, determination component414 of FIG. 4 may be operative to determine an overhead for one or moreresource blocks of downlink channel 412. In various embodiments, theoverhead may include overhead associated with implementation of andownlink control channel within the downlink channel. In someembodiments, the overhead may additionally or alternatively include aCRS overhead for the one or more resource blocks of the downlinkchannel. The embodiments are not limited in this context.

At 506, a modulation and coding scheme may be selected based on thechannel quality index and the overhead for the downlink channel. Forexample, selection component 424 of FIG. 4 may be operative to select amodulation and coding scheme for use in transmitting message 435, basedon channel quality index 406 and on the overhead determined bydetermination component 414. At 508, a message may be transmitted overthe downlink channel using the selected modulation and coding scheme.For example, communication component 408 of FIG. 4 may be operative totransmit message 435 to mobile device 450 via one or more resourceblocks of downlink channel 412. The embodiments are not limited to theseexamples.

FIG. 6 illustrates an embodiment of a storage medium 600. The storagemedium 600 may comprise an article of manufacture. In one embodiment,the storage medium 600 may comprise any non-transitory computer readablemedium or machine readable medium, such as an optical, magnetic orsemiconductor storage. The storage medium may store various types ofcomputer executable instructions, such as instructions to implement oneor more of logic flows 300 and 500. Examples of a computer readable ormachine readable storage medium may include any tangible media capableof storing electronic data, including volatile memory or non-volatilememory, removable or non-removable memory, erasable or non-erasablememory, writeable or re-writeable memory, and so forth. Examples ofcomputer executable instructions may include any suitable type of code,such as source code, compiled code, interpreted code, executable code,static code, dynamic code, object-oriented code, visual code, and thelike. The embodiments are not limited in this context.

FIG. 7 illustrates an embodiment of a device 700 for use in a broadbandwireless access network. Device 700 may implement, for example,apparatus 200, system 240, apparatus 400, system 440, storage medium 600and/or a logic circuit 728. The logic circuit 728 may include physicalcircuits to perform operations described for apparatus 200 or apparatus400, for example. As shown in FIG. 7, device 700 may include a radiointerface 710, baseband circuitry 720, and computing platform 730,although the embodiments are not limited to this configuration.

The device 700 may implement some or all of the structure and/oroperations for the apparatus 200, system 240, apparatus 400, system 440,storage medium 600, and/or logic circuit 728 in a single computingentity, such as entirely within a single device. Alternatively, thedevice 700 may distribute portions of the structure and/or operationsfor the apparatus 200, system 240, apparatus 400, system 440, storagemedium 600, and/or logic circuit 728 across multiple computing entitiesusing a distributed system architecture, such as a client-serverarchitecture, a 3-tier architecture, an N-tier architecture, atightly-coupled or clustered architecture, a peer-to-peer architecture,a master-slave architecture, a shared database architecture, and othertypes of distributed systems. The embodiments are not limited in thiscontext.

In one embodiment, radio interface 710 may include a component orcombination of components adapted for transmitting and/or receivingsingle carrier or multi-carrier modulated signals (e.g., includingcomplementary code keying (CCK) and/or orthogonal frequency divisionmultiplexing (OFDM) symbols) although the embodiments are not limited toany specific over-the-air interface or modulation scheme. Radiointerface 710 may include, for example, a receiver 712, a frequencysynthesizer 714, and/or a transmitter 716. Radio interface 710 mayinclude bias controls, a crystal oscillator and/or one or more antennas718-f. In another embodiment, radio interface 710 may use externalvoltage-controlled oscillators (VCOs), surface acoustic wave filters,intermediate frequency (IF) filters and/or RF filters, as desired. Dueto the variety of potential RF interface designs an expansivedescription thereof is omitted.

Baseband circuitry 720 may communicate with radio interface 710 toprocess receive and/or transmit signals and may include, for example, ananalog-to-digital converter 722 for down converting received signals, adigital-to-analog converter 724 for up converting signals fortransmission. Further, baseband circuitry 720 may include a baseband orphysical layer (PHY) processing circuit 726 for PHY link layerprocessing of respective receive/transmit signals. Baseband circuitry720 may include, for example, a medium access control (MAC) processingcircuit 727 for MAC/data link layer processing. Baseband circuitry 720may include a memory controller 732 for communicating with MACprocessing circuit 727 and/or a computing platform 730, for example, viaone or more interfaces 734.

In some embodiments, PHY processing circuit 726 may include a frameconstruction and/or detection module, in combination with additionalcircuitry such as a buffer memory, to construct and/or deconstructcommunication frames and/or packets. Alternatively or in addition, MACprocessing circuit 727 may share processing for certain of thesefunctions or perform these processes independent of PHY processingcircuit 726. In some embodiments, MAC and PHY processing may beintegrated into a single circuit.

The computing platform 730 may provide computing functionality for thedevice 700. As shown, the computing platform 730 may include aprocessing component 740. In addition to, or alternatively of, thebaseband circuitry 720, the device 700 may execute processing operationsor logic for the apparatus 200, system 240, apparatus 400, system 440,storage medium 600, and/or logic circuit 728 using the processingcomponent 740. The processing component 740 (and/or PHY 726 and/or MAC727) may comprise various hardware elements, software elements, or acombination of both. Examples of hardware elements may include devices,logic devices, components, processors, microprocessors, circuits,processor circuits (e.g., processor circuit 102), circuit elements(e.g., transistors, resistors, capacitors, inductors, and so forth),integrated circuits, application specific integrated circuits (ASIC),programmable logic devices (PLD), digital signal processors (DSP), fieldprogrammable gate array (FPGA), memory units, logic gates, registers,semiconductor device, chips, microchips, chip sets, and so forth.Examples of software elements may include software components, programs,applications, computer programs, application programs, system programs,software development programs, machine programs, operating systemsoftware, middleware, firmware, software modules, routines, subroutines,functions, methods, procedures, software interfaces, application programinterfaces (API), instruction sets, computing code, computer code, codesegments, computer code segments, words, values, symbols, or anycombination thereof. Determining whether an embodiment is implementedusing hardware elements and/or software elements may vary in accordancewith any number of factors, such as desired computational rate, powerlevels, heat tolerances, processing cycle budget, input data rates,output data rates, memory resources, data bus speeds and other design orperformance constraints, as desired for a given implementation.

The computing platform 730 may further include other platform components750. Other platform components 750 include common computing elements,such as one or more processors, multi-core processors, co-processors,memory units, chipsets, controllers, peripherals, interfaces,oscillators, timing devices, video cards, audio cards, multimediainput/output (I/O) components (e.g., digital displays), power supplies,and so forth. Examples of memory units may include without limitationvarious types of computer readable and machine readable storage media inthe form of one or more higher speed memory units, such as read-onlymemory (ROM), random-access memory (RAM), dynamic RAM (DRAM),Double-Data-Rate DRAM (DDRAM), synchronous DRAM (SDRAM), static RAM(SRAM), programmable ROM (PROM), erasable programmable ROM (EPROM),electrically erasable programmable ROM (EEPROM), flash memory, polymermemory such as ferroelectric polymer memory, ovonic memory, phase changeor ferroelectric memory, silicon-oxide-nitride-oxide-silicon (SONOS)memory, magnetic or optical cards, an array of devices such as RedundantArray of Independent Disks (RAID) drives, solid state memory devices(e.g., USB memory, solid state drives (SSD) and any other type ofstorage media suitable for storing information.

Device 700 may be, for example, an ultra-mobile device, a mobile device,a fixed device, a machine-to-machine (M2M) device, a personal digitalassistant (PDA), a mobile computing device, a smart phone, a telephone,a digital telephone, a cellular telephone, user equipment, eBookreaders, a handset, a one-way pager, a two-way pager, a messagingdevice, a computer, a personal computer (PC), a desktop computer, alaptop computer, a notebook computer, a netbook computer, a handheldcomputer, a tablet computer, a server, a server array or server farm, aweb server, a network server, an Internet server, a work station, amini-computer, a main frame computer, a supercomputer, a networkappliance, a web appliance, a distributed computing system,multiprocessor systems, processor-based systems, consumer electronics,programmable consumer electronics, game devices, television, digitaltelevision, set top box, wireless access point, base station, node B,subscriber station, mobile subscriber center, radio network controller,router, hub, gateway, bridge, switch, machine, or combination thereof.Accordingly, functions and/or specific configurations of device 700described herein, may be included or omitted in various embodiments ofdevice 700, as suitably desired. In some embodiments, device 700 may beconfigured to be compatible with protocols and frequencies associatedone or more of the 3GPP LTE Specifications and/or IEEE 802.16 Standardsfor WMANs, and/or other broadband wireless networks, cited herein,although the embodiments are not limited in this respect.

Embodiments of device 700 may be implemented using single input singleoutput (SISO) architectures. However, certain implementations mayinclude multiple antennas (e.g., antennas 718-f) for transmission and/orreception using adaptive antenna techniques for beamforming or spatialdivision multiple access (SDMA) and/or using MIMO communicationtechniques.

The components and features of device 700 may be implemented using anycombination of discrete circuitry, application specific integratedcircuits (ASICs), logic gates and/or single chip architectures. Further,the features of device 700 may be implemented using microcontrollers,programmable logic arrays and/or microprocessors or any combination ofthe foregoing where suitably appropriate. It is noted that hardware,firmware and/or software elements may be collectively or individuallyreferred to herein as “logic” or “circuit.”

It should be appreciated that the exemplary device 700 shown in theblock diagram of FIG. 7 may represent one functionally descriptiveexample of many potential implementations. Accordingly, division,omission or inclusion of block functions depicted in the accompanyingfigures does not infer that the hardware components, circuits, softwareand/or elements for implementing these functions would be necessarily bedivided, omitted, or included in embodiments.

FIG. 8 illustrates an embodiment of a broadband wireless access system800. As shown in FIG. 8, broadband wireless access system 800 may be aninternet protocol (IP) type network comprising an internet 810 typenetwork or the like that is capable of supporting mobile wireless accessand/or fixed wireless access to internet 810. In one or moreembodiments, broadband wireless access system 800 may comprise any typeof orthogonal frequency division multiple access (OFDMA) based wirelessnetwork, such as a system compliant with one or more of the 3GPP LTESpecifications and/or IEEE 802.16 Standards, and the scope of theclaimed subject matter is not limited in these respects.

In the exemplary broadband wireless access system 800, access servicenetworks (ASN) 812, 818 are capable of coupling with base stations (BS)(or eNodeBs) 814, 820, respectively, to provide wireless communicationbetween one or more fixed devices 816 and internet 810 and/or between orone or more mobile devices 822 and Internet 810. One example of a fixeddevice 816 and a mobile device 822 is device 700, with the fixed device816 comprising a stationary version of device 700 and the mobile device822 comprising a mobile version of device 700. ASNs 812, 818 mayimplement profiles that are capable of defining the mapping of networkfunctions to one or more physical entities on broadband wireless accesssystem 800. Base stations (or eNodeBs) 814, 820 may comprise radioequipment to provide RF communication with fixed device 816 and/ormobile device 822, such as described with reference to device 700, andmay comprise, for example, the PHY and MAC layer equipment in compliancewith a 3GPP LTE Specification or an IEEE 802.16 Standard. Base stations(or eNodeBs) 814, 820 may further comprise an IP backplane to couple toInternet 810 via ASNs 812, 818, respectively, although the scope of theclaimed subject matter is not limited in these respects.

Broadband wireless access system 800 may further comprise a visitedconnectivity service network (CSN) 824 capable of providing one or morenetwork functions including but not limited to proxy and/or relay typefunctions, for example authentication, authorization and accounting(AAA) functions, dynamic host configuration protocol (DHCP) functions,or domain name service controls or the like, domain gateways such aspublic switched telephone network (PSTN) gateways or voice over internetprotocol (VoIP) gateways, and/or internet protocol (IP) type serverfunctions, or the like. However, these are merely example of the typesof functions that are capable of being provided by visited CSN 824 orhome CSN 826, and the scope of the claimed subject matter is not limitedin these respects. Visited CSN 824 may be referred to as a visited CSNin the case where visited CSN 824 is not part of the regular serviceprovider of fixed device 816 or mobile device 822, for example wherefixed device 816 or mobile device 822 is roaming away from itsrespective home CSN 826, or where broadband wireless access system 800is part of the regular service provider of fixed device 816 or mobiledevice 822 but where broadband wireless access system 800 may be inanother location or state that is not the main or home location of fixeddevice 816 or mobile device 822.

Fixed device 816 may be located anywhere within range of one or bothbase stations (or eNodeBs) 814, 820, such as in or near a home orbusiness to provide home or business customer broadband access toInternet 810 via base stations (or eNodeBs) 814, 820 and ASNs 812, 818,respectively, and home CSN 826. It is worthy of note that although fixeddevice 816 is generally disposed in a stationary location, it may bemoved to different locations as needed. Mobile device 822 may beutilized at one or more locations if mobile device 822 is within rangeof one or both base stations (or eNodeBs) 814, 820, for example.

In accordance with one or more embodiments, operation support system(OSS) 828 may be part of broadband wireless access system 800 to providemanagement functions for broadband wireless access system 800 and toprovide interfaces between functional entities of broadband wirelessaccess system 800. Broadband wireless access system 800 of FIG. 8 ismerely one type of wireless network showing a certain number of thecomponents of broadband wireless access system 800, and the scope of theclaimed subject matter is not limited in these respects.

Various embodiments may be implemented using hardware elements, softwareelements, or a combination of both. Examples of hardware elements mayinclude processors, microprocessors, circuits, circuit elements (e.g.,transistors, resistors, capacitors, inductors, and so forth), integratedcircuits, application specific integrated circuits (ASIC), programmablelogic devices (PLD), digital signal processors (DSP), field programmablegate array (FPGA), logic gates, registers, semiconductor device, chips,microchips, chip sets, and so forth. Examples of software may includesoftware components, programs, applications, computer programs,application programs, system programs, machine programs, operatingsystem software, middleware, firmware, software modules, routines,subroutines, functions, methods, procedures, software interfaces,application program interfaces (API), instruction sets, computing code,computer code, code segments, computer code segments, words, values,symbols, or any combination thereof. Determining whether an embodimentis implemented using hardware elements and/or software elements may varyin accordance with any number of factors, such as desired computationalrate, power levels, heat tolerances, processing cycle budget, input datarates, output data rates, memory resources, data bus speeds and otherdesign or performance constraints.

One or more aspects of at least one embodiment may be implemented byrepresentative instructions stored on a machine-readable medium whichrepresents various logic within the processor, which when read by amachine causes the machine to fabricate logic to perform the techniquesdescribed herein. Such representations, known as “IP cores” may bestored on a tangible, machine readable medium and supplied to variouscustomers or manufacturing facilities to load into the fabricationmachines that actually make the logic or processor. Some embodiments maybe implemented, for example, using a machine-readable medium or articlewhich may store an instruction or a set of instructions that, ifexecuted by a machine, may cause the machine to perform a method and/oroperations in accordance with the embodiments. Such a machine mayinclude, for example, any suitable processing platform, computingplatform, computing device, processing device, computing system,processing system, computer, processor, or the like, and may beimplemented using any suitable combination of hardware and/or software.The machine-readable medium or article may include, for example, anysuitable type of memory unit, memory device, memory article, memorymedium, storage device, storage article, storage medium and/or storageunit, for example, memory, removable or non-removable media, erasable ornon-erasable media, writeable or re-writeable media, digital or analogmedia, hard disk, floppy disk, Compact Disk Read Only Memory (CD-ROM),Compact Disk Recordable (CD-R), Compact Disk Rewriteable (CD-RW),optical disk, magnetic media, magneto-optical media, removable memorycards or disks, various types of Digital Versatile Disk (DVD), a tape, acassette, or the like. The instructions may include any suitable type ofcode, such as source code, compiled code, interpreted code, executablecode, static code, dynamic code, encrypted code, and the like,implemented using any suitable high-level, low-level, object-oriented,visual, compiled and/or interpreted programming language.

The following examples pertain to further embodiments:

Example 1 is user equipment (UE), comprising processing circuitry, adetermination component for execution on the processing circuitry todetermine a received quality parameter for a channel state information(CSI) reference signal of a downlink channel and define a CSI referenceresource for the downlink channel, the determination component to definethe CSI reference resource to include one or more resource elements(REs) allocated to a downlink control channel implemented within thedownlink channel, and a selection component for execution on theprocessing circuitry to select a channel quality indicator (CQI) indexbased on the received quality parameter and the CSI reference resource.

In Example 2, the downlink channel of Example 1 may optionally comprisea physical downlink shared channel (PDSCH), and the downlink controlchannel may optionally comprise an enhanced physical downlink controlchannel (EPDCCH).

In Example 3, the UE of Example 2 may optionally be configured with oneor more EPDCCH physical resource block (PRB) sets, and the determinationcomponent may optionally define the CSI reference resource based on theone or more EPDCCH PRB sets.

In Example 4, the selection component of any one of Examples 1 to 3 mayoptionally define the CSI reference resource to include one or more REscomprising cell-specific reference signal (CRS) overhead.

In Example 5, the CQI index of any one of Examples 1 to 4 may optionallyidentify a modulation and coding scheme (MCS) for transmission of amessage to the UE over the downlink channel.

In Example 6, the received quality parameter of any one of Examples 1 to5 may optionally comprise channel measurements for a CSI referencesignal (CSI-RS) and interference measurements for a CSI interferencemeasurement (CSI-IM) resource.

In Example 7, the UE of any one of Examples 1 to 6 may optionallycomprise a display, a radio frequency (RF) transceiver, and one or moreRF antennas.

Example 8 is a wireless communications method, comprising receiving, atuser equipment (UE), a channel state information (CSI) reference signal(CSI-RS) and a CSI interference measurement (CSI-IM) resource,calculating, by a processor, a channel measurement for the CSI-RS and aninterference measurement for the CSI-IM resource, defining a referenceresource for a physical downlink shared channel (PDSCH) to include a setof cell-specific reference signal (CRS) overhead resource elements(REs), and selecting a CQI index based on the channel measurement, theinterference measurement, and the reference resource.

In Example 9, the wireless communications method of Example 8 mayoptionally comprise defining the reference resource such that the set ofCRS overhead REs comprises a number of REs corresponding to a number ofCRS antenna ports configured for a serving cell of the UE.

In Example 10, the wireless communications method of Example 8 mayoptionally comprise defining the reference resource such that the set ofCRS overhead REs comprises a number of REs corresponding to a number ofCRS antenna ports associated with a PDSCH RE mapping and quasi-locationindicator (PQI) state with a lowest index value.

In Example 11, the wireless communications method of Example 8 mayoptionally comprise defining the reference resource such that the set ofCRS overhead REs comprises a number of REs corresponding to a number ofCRS antenna ports associated with a non-zero power (NZP) CSI-RS for aCSI process of the UE.

In Example 12, the wireless communications method of any one of Examples8 to 11 may optionally comprise defining the reference resource toinclude one or more REs allocated to an enhanced physical downlinkcontrol channel (EPDCCH).

In Example 13, the CQI index of any one of Examples 8 to 12 mayoptionally indicate a modulation and coding scheme (MCS) fortransmission of data to the UE in one or more PDSCH resource blocks.

Example 14 is at least one machine-readable medium comprising a set ofinstructions that, in response to being executed on a computing device,cause the computing device to perform a wireless communications methodaccording to any one of Examples 8 to 13.

Example 15 is an apparatus, comprising means for performing a wirelesscommunications method according to any one of Examples 8 to 13.

Example 16 is an evolved node B (eNB), comprising a processor circuit, acommunication component for execution by the processor circuit toreceive a channel quality index for a physical downlink shared channel(PDSCH), the channel quality index associated with a defined referenceresource, and a selection component for execution by the processorcircuit to select a modulation and coding scheme (MCS) for transmissionover the PDSCH of user equipment (UE) data in one or more resourceblocks, the selection component to compensate for a difference between acell-specific reference signal (CRS) overhead of the defined referenceresource and a CRS overhead of the one or more resource blocks whenselecting the MCS.

In Example 17, the selection component of Example 16 may optionally befor execution by the processor circuit to compensate for a differencebetween a number of CRS resource elements (REs) in the defined referenceresource and a number of CRS REs in each of the one or more resourceblocks.

In Example 18, the channel quality index of any one of Examples 16 to 17may optionally indicate a first MCS, and the selection component mayoptionally be for execution by the processor circuit to either selectthe first MCS or identify and select a second MCS based on thedifference between the CRS overhead of the defined reference resourceand the CRS overhead of the one or more resource blocks.

In Example 19, the selection component of any one of Examples 16 to 18may optionally be for execution by the processor circuit to compensatefor an enhanced physical downlink control channel (EPDCCH) implementedwithin the PDSCH when selecting the MCS.

In Example 20, the CRS overhead of the one or more resource blocks ofany one of Examples 16 to 19 may optionally correspond to a number ofCRS antenna ports used by the eNB.

In Example 21, the channel quality index of any one of Examples 16 to 20may optionally comprise a channel quality indicator (CQI) index.

In Example 22, the defined reference resource of any one of Examples 16to 21 may optionally comprise a channel state information (CSI)reference resource.

Example 23 is at least one machine-readable medium comprising a set ofwireless communications instructions that, in response to being executedon a computing device, cause the computing device to receive, at anevolved node B (eNB), a channel quality indicator (CQI) index for aphysical downlink shared channel (PDSCH), determine an enhanced physicaldownlink control channel (EPDCCH) overhead of one or more resourceblocks of the PDSCH, and select a modulation and coding scheme (MCS) fortransmission of a message via the one or more resource blocks based onthe CQI index and the EPDCCH overhead.

In Example 24, the EPDCCH overhead of Example 23 may optionallycorrespond to one or more EPDCCH physical resource block (PRB) setsconfigured for the PDSCH.

In Example 25, the at least one machine-readable medium of any one ofExamples 23 to 24 may optionally comprise wireless communicationsinstructions that, in response to being executed on the computingdevice, cause the computing device to transmit the message via a set ofresource elements (REs) in the one or more resource blocks.

In Example 26, the CQI index of any one of Examples 23 to 25 mayoptionally correspond to a channel state information (CSI) referenceresource defined to comprise no EPDCCH overhead.

In Example 27, the at least one machine-readable medium of any one ofExamples 23 to 26 may optionally comprise wireless communicationsinstructions that, in response to being executed on the computingdevice, cause the computing device to determine a cell-specificreference signal (CRS) overhead of the one or more resource blocks, andselect the MCS based on the CQI index, the EPDCCH overhead, and the CRSoverhead.

Example 28 is a wireless communications method, comprising determining,by a processor circuit at user equipment (UE), a received qualityparameter for a channel state information (CSI) reference signal of adownlink channel, defining a CSI reference resource for the downlinkchannel, the CSI reference resource to include one or more resourceelements (REs) allocated to a downlink control channel implementedwithin the downlink channel, and selecting a channel quality indicator(CQI) index based on the received quality parameter and the CSIreference resource.

In Example 29, the downlink channel of Example 28 may optionallycomprise a physical downlink shared channel (PDSCH), and the downlinkcontrol channel may optionally comprise an enhanced physical downlinkcontrol channel (EPDCCH).

In Example 30, the wireless communications method of Example 29 mayoptionally comprise defining the CSI reference resource based on one ormore EPDCCH physical resource block (PRB) sets with which the UE isconfigured.

In Example 31, the wireless communications method of any one of Examples28 to 30 may optionally comprise defining the CSI reference resource toinclude one or more REs comprising cell-specific reference signal (CRS)overhead.

In Example 32, the CQI index of any one of Examples 28 to 31 mayoptionally identify a modulation and coding scheme (MCS) fortransmission of a message to the UE over the downlink channel.

In Example 33, the received quality parameter of any one of Examples 28to 32 may optionally comprise channel measurements for a CSI referencesignal (CSI-RS) and interference measurements for a CSI interferencemeasurement (CSI-IM) resource.

Example 34 is at least one machine-readable medium comprising a set ofinstructions that, in response to being executed on a computing device,cause the computing device to perform a wireless communications methodaccording to any one of Examples 28 to 33.

Example 35 is an apparatus, comprising means for performing a wirelesscommunications method according to any one of Examples 28 to 33.

Example 36 is user equipment (UE), comprising a processor, adetermination component for execution by the processor to receive achannel state information (CSI) reference signal (CSI-RS) and a CSIinterference measurement (CSI-IM) resource, calculate a channelmeasurement for the CSI-RS and an interference measurement for theCSI-IM resource, and define a reference resource for a physical downlinkshared channel (PDSCH) to include a set of cell-specific referencesignal (CRS) overhead resource elements (REs), and a selection componentfor execution by the processor to select a CQI index based on thechannel measurement, the interference measurement, and the referenceresource.

In Example 37, the determination component of Example 36 may optionallybe for execution by the processor to define the reference resource suchthat the set of CRS overhead REs comprises a number of REs correspondingto a number of CRS antenna ports configured for a serving cell of theUE.

In Example 38, the determination component of Example 36 may optionallybe for execution by the processor to define the reference resource suchthat the set of CRS overhead REs comprises a number of REs correspondingto a number of CRS antenna ports associated with a PDSCH RE mapping andquasi-location indicator (PQI) state with a lowest index value.

In Example 39, the determination component of Example 36 may optionallybe for execution by the processor to define the reference resource suchthat the set of CRS overhead REs comprises a number of REs correspondingto a number of CRS antenna ports associated with a non-zero power (NZP)CSI-RS for a CSI process of the UE.

In Example 40, the determination component of any one of Examples 36 to39 may optionally be for execution by the processor to define thereference resource to include one or more REs allocated to an enhancedphysical downlink control channel (EPDCCH).

In Example 41, the CQI index of any one of Examples 36 to 40 mayoptionally indicate a modulation and coding scheme (MCS) fortransmission of data to the UE in one or more PDSCH resource blocks.

Example 42 is a wireless communications method, comprising receiving, atan evolved node B (eNB), a channel quality index for a physical downlinkshared channel (PDSCH), the channel quality index associated with adefined reference resource, selecting, by a processor circuit, amodulation and coding scheme (MCS) for transmission over the PDSCH ofuser equipment (UE) data in one or more resource blocks, andcompensating for a difference between a cell-specific reference signal(CRS) overhead of the defined reference resource and a CRS overhead ofthe one or more resource blocks when selecting the MCS.

In Example 43, the wireless communications method of Example 42 mayoptionally comprise compensating for a difference between a number ofCRS resource elements (REs) in the defined reference resource and anumber of CRS REs in each of the one or more resource blocks.

In Example 44, the channel quality index of any one of Examples 42 to 43may optionally indicate a first MCS, and the wireless communicationsmethod may optionally comprise either selecting a first MCS indicated bythe channel quality index or identifying and selecting a second MCSbased on the difference between the CRS overhead of the definedreference resource and the CRS overhead of the one or more resourceblocks.

In Example 45, the wireless communications method of any one of Examples42 to 44 may optionally comprise compensating for an enhanced physicaldownlink control channel (EPDCCH) implemented within the PDSCH whenselecting the MCS.

In Example 46, the CRS overhead of the one or more resource blocks ofany one of Examples 42 to 45 may optionally correspond to a number ofCRS antenna ports used by the eNB.

In Example 47, the channel quality index of any one of Examples 42 to 46may optionally comprise a channel quality indicator (CQI) index.

In Example 48, the defined reference resource of any one of Examples 42to 47 may optionally comprise a channel state information (CSI)reference resource.

Example 49 is at least one machine-readable medium comprising a set ofinstructions that, in response to being executed on a computing device,cause the computing device to perform a wireless communications methodaccording to any one of Examples 42 to 48.

Example 50 is an apparatus, comprising means for performing a wirelesscommunications method according to any one of Examples 42 to 48.

Example 51 is an evolved node B (eNB), comprising a processor circuit, acommunication component for execution by the processor circuit toreceive a channel quality indicator (CQI) index for a physical downlinkshared channel (PDSCH), a determination component for execution by theprocessor circuit to determine an enhanced physical downlink controlchannel (EPDCCH) overhead of one or more resource blocks of the PDSCH,and a selection component for execution by the processor circuit toselect a modulation and coding scheme (MCS) for transmission of amessage via the one or more resource blocks based on the CQI index andthe EPDCCH overhead.

In Example 52, the EPDCCH overhead of Example 51 may optionallycorrespond to one or more EPDCCH physical resource block (PRB) setsconfigured for the PDSCH.

In Example 53, the communication component of any one of Examples 51 to52 may optionally be for execution by the processor circuit to transmitthe message via a set of resource elements (REs) in the one or moreresource blocks.

In Example 54, the CQI index of any one of Examples 51 to 53 mayoptionally correspond to a channel state information (CSI) referenceresource defined to comprise no EPDCCH overhead.

In Example 55, the determination component of any one of Examples 51 to54 may optionally be for execution by the processor circuit to determinea cell-specific reference signal (CRS) overhead of the one or moreresource blocks, and the selection component may optionally be forexecution by the processor circuit to select the MCS based on the CQIindex, the EPDCCH overhead, and the CRS overhead.

In Example 56, the eNB of any one of Examples 51 to 55 may optionallycomprise a display, a radio frequency (RF) transceiver, and one or moreRF antennas.

Example 57 is a wireless communications method, comprising receiving, atan evolved node B (eNB), a channel quality indicator (CQI) index for aphysical downlink shared channel (PDSCH), determining, by a processorcircuit, an enhanced physical downlink control channel (EPDCCH) overheadof one or more resource blocks of the PDSCH, and selecting a modulationand coding scheme (MCS) for transmission of a message via the one ormore resource blocks based on the CQI index and the EPDCCH overhead.

In Example 58, the EPDCCH overhead of Example 57 may optionallycorrespond to one or more EPDCCH physical resource block (PRB) setsconfigured for the PDSCH.

In Example 59, the wireless communications method of any one of Examples57 to 58 may optionally comprise transmitting the message via a set ofresource elements (REs) in the one or more resource blocks.

In Example 60, the CQI index of any one of Examples 57 to 59 mayoptionally correspond to a channel state information (CSI) referenceresource defined to comprise no EPDCCH overhead.

In Example 61, the wireless communications method of any one of Examples57 to 60 may optionally comprise determining a cell-specific referencesignal (CRS) overhead of the one or more resource blocks, and selectingthe MCS based on the CQI index, the EPDCCH overhead, and the CRSoverhead.

Example 62 is at least one machine-readable medium comprising a set ofinstructions that, in response to being executed on a computing device,cause the computing device to perform a wireless communications methodaccording to any one of Examples 57 to 61.

Example 63 is an apparatus, comprising means for performing a wirelesscommunications method according to any one of Examples 57 to 61.

Example 64 is user equipment (UE), comprising a processor circuit toderive a channel quality indicator (CQI) index for a reference resourceof a shared wireless downlink channel for an orthogonalfrequency-division multiple access (OFDMA) system, wherein the CQI indexis derived without reference to elements in the reference resource usedby an enhanced downlink control channel, and a radio-frequency (RF)transmitter coupled to the processor circuit, the RF transmitter totransmit electromagnetic signals representing the CQI index on awireless uplink channel.

In Example 65, the CQI index of Example 64 may optionally comprisechannel state information (CSI) for a serving cell of the UE.

In Example 66, the reference resource of any one of Examples 64 to 65may optionally comprise a channel state information (CSI) referenceresource defined in a frequency domain by a group of downlink physicalresource blocks corresponding to a band to which the CQI index relates.

In Example 67, the CQI index of any one of Examples 64 to 66 mayoptionally be derived with the reference resource having a first threeorthogonal frequency-division multiplexing (OFDM) symbols occupied bycontrol signals.

In Example 68, the reference resource of any one of Examples 64 to 67may optionally comprise a channel state information (CSI) referenceresource defined in a time domain by a single downlink subframe.

In Example 69, the processor circuit of any one of Examples 64 to 68 mayoptionally configure a channel state information (CSI) process to reportCSI comprising the CQI index, a precoding matrix indicator (PMI) and arank indication (RI).

In Example 70, the shared wireless downlink channel of any one ofExamples 64 to 69 may optionally comprise a physical downlink sharedchannel (PDSCH).

In Example 71, the UE of any one of Examples 64 to 70 may optionallycomprise one or more RF antennas coupled to the RF transmitter.

In Example 72, the UE of any one of Examples 64 to 71 may optionallycomprise a touchscreen display.

Example 73 is user equipment (UE), comprising a processor circuit toconfigure a channel state information (CSI) process to report aprecoding matrix indicator (PMI), a rank indication (RI), and a channelquality indicator (CQI) index for a CSI reference resource of a downlinkshared channel, the processor circuit to derive the CQI index for theCSI reference resource using a parameter where a cell-specific referencesignal (CRS) overhead of the CSI reference resource is a same value as aCRS overhead corresponding to a number of CRS antenna ports of a servingcell of the UE.

In Example 74, the downlink shared channel of Example 73 may optionallycomprise a physical downlink shared channel (PDSCH).

In Example 75, the CSI reference resource of any one of Examples 73 to74 may optionally be defined in a time domain by a single downlinksubframe.

In Example 76, the CSI reference resource of any one of Examples 73 to75 may optionally be defined in a frequency domain by a group ofdownlink physical resource blocks corresponding to a band to which theCQI index relates.

In Example 77, the processor circuit of any one of Examples 73 to 76 mayoptionally configure the CSI process to report CSI for a serving cell ofthe UE, and the CSI may optionally comprise the CQI index, the PMI, andthe RI.

In Example 78, the processor circuit of any one of Examples 73 to 77 mayoptionally derive the CQI index based on an assumption that no elementsin the CSI reference resource are used by an enhanced physical downlinkcontrol channel (EPDCCH).

In Example 79, the UE of any one of Examples 73 to 78 may optionallycomprise a transceiver coupled to one or more radio frequency (RF)antennas to transmit the CQI index.

In Example 80, the UE of any one of Examples 73 to 79 may optionallycomprise a user input device.

Numerous specific details have been set forth herein to provide athorough understanding of the embodiments. It will be understood bythose skilled in the art, however, that the embodiments may be practicedwithout these specific details. In other instances, well-knownoperations, components, and circuits have not been described in detailso as not to obscure the embodiments. It can be appreciated that thespecific structural and functional details disclosed herein may berepresentative and do not necessarily limit the scope of theembodiments.

Some embodiments may be described using the expression “coupled” and“connected” along with their derivatives. These terms are not intendedas synonyms for each other. For example, some embodiments may bedescribed using the terms “connected” and/or “coupled” to indicate thattwo or more elements are in direct physical or electrical contact witheach other. The term “coupled,” however, may also mean that two or moreelements are not in direct contact with each other, but yet stillco-operate or interact with each other.

Unless specifically stated otherwise, it may be appreciated that termssuch as “processing,” “computing,” “calculating,” “determining,” or thelike, refer to the action and/or processes of a computer or computingsystem, or similar electronic computing device, that manipulates and/ortransforms data represented as physical quantities (e.g., electronic)within the computing system's registers and/or memories into other datasimilarly represented as physical quantities within the computingsystem's memories, registers or other such information storage,transmission or display devices. The embodiments are not limited in thiscontext.

It should be noted that the methods described herein do not have to beexecuted in the order described, or in any particular order. Moreover,various activities described with respect to the methods identifiedherein can be executed in serial or parallel fashion.

Although specific embodiments have been illustrated and describedherein, it should be appreciated that any arrangement calculated toachieve the same purpose may be substituted for the specific embodimentsshown. This disclosure is intended to cover any and all adaptations orvariations of various embodiments. It is to be understood that the abovedescription has been made in an illustrative fashion, and not arestrictive one. Combinations of the above embodiments, and otherembodiments not specifically described herein will be apparent to thoseof skill in the art upon reviewing the above description. Thus, thescope of various embodiments includes any other applications in whichthe above compositions, structures, and methods are used.

It is emphasized that the Abstract of the Disclosure is provided tocomply with 37 C.F.R. § 1.72(b), requiring an abstract that will allowthe reader to quickly ascertain the nature of the technical disclosure.It is submitted with the understanding that it will not be used tointerpret or limit the scope or meaning of the claims. In addition, inthe foregoing Detailed Description, it can be seen that various featuresare grouped together in a single embodiment for the purpose ofstreamlining the disclosure. This method of disclosure is not to beinterpreted as reflecting an intention that the claimed embodimentsrequire more features than are expressly recited in each claim. Rather,as the following claims reflect, inventive subject matter lies in lessthan all features of a single disclosed embodiment. Thus the followingclaims are hereby incorporated into the Detailed Description, with eachclaim standing on its own as a separate preferred embodiment. In theappended claims, the terms “including” and “in which” are used as theplain-English equivalents of the respective terms “comprising” and“wherein,” respectively. Moreover, the terms “first,” “second,” and“third,” etc. are used merely as labels, and are not intended to imposenumerical requirements on their objects.

Although the subject matter has been described in language specific tostructural features and/or methodological acts, it is to be understoodthat the subject matter defined in the appended claims is notnecessarily limited to the specific features or acts described above.Rather, the specific features and acts described above are disclosed asexample forms of implementing the claims.

What is claimed is:
 1. User equipment (UE), comprising: a radiofrequency (RF) receiver to receive a channel state information (CSI)reference signal (CSI-RS); circuitry coupled to the RF receiver, thecircuitry to derive a channel quality indicator (CQI) index for afrequency band of an orthogonal frequency-division multiple access(OFDMA) wireless communication system, the logic circuitry to derive theCQI index based on the CSI-RS, a CSI interference measurement (CSI-IM)resource, and a CSI reference resource of a shared wireless downlinkchannel, without reference to resource elements of the CSI referenceresource that are allocated to an enhanced physical downlink controlchannel (EPDCCH); and an RF transmitter coupled to the circuitry, the RFtransmitter to transmit electromagnetic signals representing the CQIindex on a wireless uplink channel.
 2. The UE of claim 1, the CQI indexcomprising CSI for a serving cell of the UE.
 3. The UE of claim 1, theCSI reference resource defined in a frequency domain by a group ofdownlink physical resource blocks corresponding to the frequency band.4. The UE of claim 1, a first three orthogonal frequency-divisionmultiplexing (OFDM) symbols of the CSI reference resource to be occupiedby control signals.
 5. The UE of claim 1, the CSI reference resourcedefined in a time domain by a single downlink subframe.
 6. The UE ofclaim 1, the logic to configure a CSI process to report CSI comprisingthe CQI index, a precoding matrix indicator (PMI) and a rank indication(RI).
 7. The UE of claim 1, the shared wireless downlink channelcomprising a physical downlink shared channel (PDSCH).
 8. The UE ofclaim 1, comprising one or more RF antennas coupled to the RFtransmitter.
 9. The UE of claim 1, comprising a touchscreen display. 10.User equipment (UE), comprising: a radio frequency (RF) receiver toreceive a channel state information (CSI) reference signal (CSI-RS);circuitry coupled to the RF receiver, the circuitry to configure achannel state information (CSI) process to report a precoding matrixindicator (PMI), a rank indication (RI), and a channel quality indicator(CQI) index for an orthogonal frequency-division multiple access (OFDMA)frequency band, the circuitry to derive the CQI index based on theCSI-RS, a CSI interference measurement (CSI-IM) resource, and a CSIreference resource of a downlink shared channel, the CSI referenceresource to comprise a same cell-specific reference signal (CRS)overhead as a CRS overhead corresponding to a number of CRS antennaports of a serving cell of the UE; and an RF transmitter coupled to thecircuitry, the RF transmitter to transmit the CQI index over a wirelessuplink channel.
 11. The UE of claim 10, the downlink shared channelcomprising a physical downlink shared channel (PDSCH).
 12. The UE ofclaim 10, the CSI reference resource defined in a time domain by asingle downlink subframe.
 13. The UE of claim 10, the CSI referenceresource defined in a frequency domain by a group of downlink physicalresource blocks corresponding to the OFDMA frequency band.
 14. The UE ofclaim 10, the logic to configure the CSI process to report CSI for aserving cell of the UE, the CSI comprising the CQI index, the PMI, andthe RI.
 15. The UE of claim 10, the logic to derive the CQI index basedon an assumption that no resource elements of the CSI reference resourceare allocated to an enhanced physical downlink control channel (EPDCCH).16. The UE of claim 10, comprising one or more RF antennas coupled tothe RF transceiver.
 17. The UE of claim 10, comprising a user inputdevice.
 18. At least one non-transitory computer-readable storage mediumcomprising a set of instructions that, in response to being executed onuser equipment (UE), cause the UE to: receive a channel stateinformation (CSI) reference signal (CSI-RS) and a CSI interferencemeasurement (CSI-IM) resource; define a CSI reference resource of awireless downlink channel to comprise a cell-specific reference signal(CRS) overhead including a same number of CRS overhead resource elements(REs) as a CRS overhead corresponding to a number of CRS antenna portsof a serving cell of the UE; derive a channel quality indicator (CQI)index based on the CSI-RS, the CSI-IM resource, and the CSI referenceresource; and transmit the CQI index over a wireless uplink channel. 19.The at least one non-transitory computer-readable storage medium ofclaim 18, comprising instructions that, in response to being executed onthe UE, cause the UE to configure a CSI process to report the CQI index.20. The at least one non-transitory computer-readable storage medium ofclaim 19, comprising instructions that, in response to being executed onthe UE, cause the UE to configure the CSI process to report the CQIindex, a precoding matrix indicator (PMI) and a rank indication (RI).21. The at least one non-transitory computer-readable storage medium ofclaim 18, comprising instructions that, in response to being executed onthe UE, cause the UE to: determine a channel measurement based on theCSI-RS; determine an interference measurement based on the CSI-IMresource; and derive the CQI index based on the channel measurement, theinterference measurement, and the CSI reference resource.
 22. The atleast one non-transitory computer-readable storage medium of claim 18,comprising instructions that, in response to being executed on the UE,cause the UE to derive the CQI index without reference to a number ofREs of the CSI reference resource that are allocated to an enhancedphysical downlink control channel (EPDCCH).
 23. The at least onenon-transitory computer-readable storage medium of claim 18, thewireless downlink channel to comprise a shared channel of an orthogonalfrequency-division multiple access (OFDMA) wireless network.
 24. The atleast one non-transitory computer-readable storage medium of claim 18,the wireless downlink channel to comprise a physical downlink sharedchannel (PDSCH).
 25. The at least one non-transitory computer-readablestorage medium of claim 18, the CSI-RS to comprise a non-zero power(NZP) CSI-RS.